Table 6.

Sensitivity, specificity, and Youden Index of the independent risk factors.

Variable	Sensitivity (%)	Specificity (%)	Cut-off	AUC	95%CI	P	Standard error	Youden index
sB7-H3 (7d)	76.70	73.80	30.12	0.781	0.670–0.893	0.000	0.057	0.505
IL-18 (14d)	73.30	71.40	167.99	0.694	0.567–0.820	0.005	0.065	0.447
NCIS	73.30	81.00	94.00	0.789	0.676–0.902	0.000	0.058	0.543
Electrolyte disturbances	——	——	——	0.710	0.588–0.831	0.003	0.062	——
hs-PDA	——	——	——	0.621	0.485–0.757	0.081	0.069	——
The age that infants achieved 120 kcal/kg.d via enteral feeding ≥40 days after birth	——	——	——	0.769	0.655–0.883	0.000	0.058	——
Prediction model	86.70	97.60	0.65	0.960	0.919–1.000	0.000	0.021	0.843

——Not calculated.